What is the main purpose of encryption?

• Speed up data transmission.

• Increase data size.

• Transform data into a form that is difficult to understand by unauthorized parties.

• Permanently delete data.

Caesar cipher is a type of encryption that works by:

• Reversing the order of the alphabet.

• Shifting each letter in the alphabet by a certain amount.

• Replacing each letter with a different symbol.

• Randomly scrambling the order of letters.

What is the main difference between Caesar cipher and Atbash cipher?

• Caesar cipher uses shifting, while Atbash cipher reverses the alphabet.

• Caesar cipher is more secure than Atbash cipher.

• Atbash cipher can only be used for the English language.

• There is no significant difference.

Rot 13 is a type of encryption that is a variation of:

• Atbash cipher.

• Caesar cipher.

• Vigenère cipher.

• None of the above.

If we want to decrypt a message that was encrypted with Caesar cipher, what do we need to know?

• Encryption key.

• Length of the original message.

• Language used.

• All of the above.

Why are Caesar cipher and Atbash cipher considered simple encryption algorithms?

• Because both are very easy to break.

• Because both only use shifting or reversing operations.

• Because both do not require an encryption key.

• All of the above.

What is the main weakness of Caesar cipher and Atbash cipher?

• Encryption key that is too long.

• Algorithms that are too complex.

• Easily broken with frequency analysis techniques.

• Cannot be used to encrypt files.

If a message is encrypted twice using Caesar cipher with the same key, what will happen?

• The message will become harder to break.

• The message will return to its original form.

• The message will become random.

• No changes will occur.

What is the purpose of studying simple encryption algorithms like Caesar cipher and Atbash cipher?

• To be able to create strong encryption software.

• To understand the basic concepts of encryption before studying more complex algorithms.

• To be able to break all types of encryption codes.

• All of the above.

Which of the following is not an example of encryption application in everyday life?

• Password to unlock a phone.

• Online transactions using credit cards.

• Sending emails.

• Reading books.